System of generators for alternating electric currents



(No Model.)

O. B. SHALLENBERGER. SYSTEM OF GENERATORS FOR ALTERNATING ELECTRIC CURRENTS.

No. 404,567. Patented June 4, 1889.

WITNESSES: INVE/VTUH,

A M/WEBB,

UNITED STATES PATENT OFFICE.

OLIVER l3. SIIALLENIEERGER, OF ROCHESTER, ASSIGNOR TO THE W LS'IING- IIOU SE ELECTRIC COMPANY, OF PITTSIEYRG, PENNSYLVANIA.

SYSTEM OF GENERATORS FOR ALIERNATING ELECTRIC CURRENTS.

SPECIFICATION forming part of Letters Patent No. 404,567, dated June 4, 1889. Application filed September 8, 1388. Serial No. 284,896. (No model.)

T whom it may concern: Referring to the figure, A and A repre- Be it known that I, OLIVER B. SHALLEN- sent the a-rmatures of two alternate-current- BERGER, a citizen of the United States, residelectric generators. These revolve between ingin Rochester-,in the county of Beaver and their respective field-magnets, the poles of 55 5 State of Pennsylvania, have invented certain which are represented at N S,N S. The ar new and useful Improvements in Systems of mature A is wound with generating-coils l5 Generators for Alternating Electric Currents, B and the armature A with generating-co ls (Case 230,) of which the following is a speci- 3 B in a manner well understood. The coils :iication. B have their respective terminals connected 0 IO The invention relates to systems of distriwith collecting-rings c d, to which are apbution of energy by alternating electric curplied brushes g h, which are respectively rents in which two or more generators are connected with lines Llj, leading to theworlcemployed; and the object of the invention is circuit. A converter C is shown as having to provide simple, eilicient, and reliable its primary coils connected between the con- I5 meansformaint'ainingthearmaturcsoftwoinductors L If and as having its secondary dependent generators delivering alternating coil connected with translating devices, such currents in certain relative positions with refas incandescent lamps D D. erence to each other, or, in other words, caus- The coils I 13 of the armature A have ing them to deliver their currents so that their their respective terminals connected with 001- 2o phases shall have a predetermined relation to lector-rings c (P. Brushes 7L2 rest upon each other in time. Thus, if it is desired to these rings, and are respectively connected obtain from two independent circuits supwith main lines L L. .These in turn supply plied by independent generators for any purtranslating devices D D through a converter pose electric currents the phases of which 1". If new it is desired for any reason to 2 5 diiter in time, it is necessary that the genercause the arinatures to revolve in synchroators themselves should be maintained in a nisni with each other, it may be accomplished certain definite relation to each other. in the following manner: Supplemental coils In carrying out the invention there is ap- Z) b may be wound upon the armature A plied to the armature of one of the generators in a position dependent upon the relative So 30 supplemental coils, which are connected in times which it is desired that the phases of parallel with the main generating-coils of the the currents upon the two circuits shall other armature. The current delivered by have. Thus in the drawing they are shown these supplemental coils tends to hold the with their axis at an angle of forty-five dearmature of the other generator in the same grees to the axis of the coils B 3, and therc- 3 5 position with reference to its held-magnets as fore in the particular organization shown is occupied by the supplemental coils, and the phases of the currents developed in the vice versa. The currents therefore delivered coil I) will be separated in time from the by the two generators upon their respective phases of the currents delivered by the coils circuits will have their phases coinciding or 13 by one-quarter of a period. The terminals 4o differing from each other in time by an of the coils b are connected with collectoramount dependent upon the position occurings c j, respectively, and theseare supplied pied by the supplemental coils upon the arwith brushes 1' 7r, which are respectively conmature with reference to the position of the nected with the brushes 7L3 5/ so that the curmain generating-coils upon that armature. rents from the supplemental coils are led 5 In building the armature it may be conventhrough the coils l of the armature A This ient to construct them all with supplemental will cause the two armatnres to synchronize coils, and then in practice use only those in a manner well understood, and the phases which may be required. of the currents upon the two circuits L L In the accompanying drawing there is and L L will differ from each other by one- I00 50 shown in. diagram an organization of circuits quarter of a period. It is evident that this and apparatus illustrating the invention. relation may be varied by changing the position of the coils b with reference to the coils B. It now it is desired to operate an electric motor M, for instance, of the character in which two windings are employed, which windings are designed to be traversed by alternating currents the phases of which diffor in time, then one set of windings may be connected with the circuit L L and the other with the circuit L L, as represented by the conductors 1 3 and 2 4t.

In some instances it may be desirable to derive from the currents upon the two circuits thus supplied an independent current due to the combination or superposition of the currents delivered by the two generators. I have discovered that two alternating currents whose phases differ in time by a proper amount when superposed produce a resuItant alternating current, the effects of which in many instances are equivalent to a single alternating current, and thus by connecting the primary coil of the converter 0 between the lines L L and connecting the lines L and L with each other, as indicated by the dotted line 0, the currents from the two machines will be superposed and the lights I) in the secondary circuit of the converter will be operated by reason of the resultant current.

I11 some instances it may be desired to employ but one conductor in place of the two conductors L and L Thus the line L may be united with the line L near the generator, as indicated by the dotted line 0', and the line L then dispensed with.

I claim as my invention 1. The combination of two alternating-current electric generators and synchronizingcoils applied to the armature of one of the generators and connected in parallel with the coils of the other generator.

2. The combination of two alternating-current electric generators and their circuits and synchronizing-coils applied to the armature of one of the generators and connected in parallel with the coils of the other generator and having their magnetic axis at an angle with reference to the main coils of the firstnamed generator.

3. The combination, with two alternatingcurrent electric generators, of synchronizingcoils applied to the armature of oneof the generators and connected in parallel with the coils of the other generator, translating (levices operated from the respective circuits of said armatures, and a single apparatus deriving independent currents from the circuits of said generators.

4. The combination, with two alternatingcurrent electric generators delivering two currents differing in the time of their phases, of translating devices deriving currents from the respective generators and other translating devices deriving currents due to the superposition of the two currents of the said generators.

In testimony whereof I have hereunto subscribed my name this 7th day of September, A. D. 1888.

OLIVER I3. SHALLENBERGER.

'IVitnesses:

O. (J. WOLFE, CHARLES A. TERRY. 

